Mediatek Corporation

Ming-Long Wu

Chia-Yun Cheng

Yung-Chang Chang

Sheng-Jen Wang

Chao-I Wu

Han-Liang Chou

Tung-Hsing Wu

Li-Heng Chen

Ting-An Lin

Yi-Hsin Huang

Chung-Hua Tsai

A context-based adaptive binary arithmetic coding (CABAC) decoder includes a bin decode circuit and a context update circuit. The bin decode circuit supports decoding of multiple bins in one cycle. The multiple bins include a first bin and a second bin. The bin decode circuit generates a bin value of the first bin according to a first set of multiple contexts, a first range and a first offset, and generates one bin value of the second bin according to a second set of multiple contexts, a second range and a second offset. The context update circuit updates the first set of multiple contexts in response to the bin value of the first bin, to generate a first set of multiple updated contexts, and updates the second set of multiple contexts in response to said one bin value of the second bin, to generate a second set of multiple updated contexts.

Context-based adaptive binary arithmetic coding decoder capable of decoding multiple bins in one cycle and associated decoding method

A video residual decoding apparatus is used for applying residual decoding to a transform block that is divided into sub-blocks, and includes a residual decoding circuit and a storage device. The residual decoding circuit enters a coefficient loop for decoding one or more syntax elements at each of coefficient positions within a sub-block that has at least one non-zero coefficient level. The coefficient loop includes one decoding pass and at least one other decoding pass. During the at least one other decoding pass, the residual decoding circuit records side information in the storage device, where the side information is indicative of specific coefficient positions at which specific syntax elements need to be decoded in the one decoding pass. During the one decoding pass, the residual decoding circuit refers to the side information for decoding the specific syntax elements at the specific coefficient positions, respectively.

Video residual decoding apparatus using storage device to store side information and/or state information for syntax element decoding optimization and associated method

A video residual decoding apparatus includes a residual decoding circuit and a neighbor storage device. The residual decoding circuit applies residual decoding to a transform block, wherein the transform block is divided into M sub-blocks, M is a positive integer, and the M sub-blocks are processed by the residual decoding in a diagonal scan order. The neighbor storage device stores neighbor data that belong to neighboring sub-blocks and are referenced by the residual decoding of a current sub-block, wherein neighbor data belonging to a sub-block is derived from a residual decoding result of the sub-block, and a storage size of the neighbor storage device is not larger than a maximum data amount of neighbor data derived from residual decoding results of N sub-blocks, where N is a positive integer, and N is smaller than M.

Video residual decoding apparatus using neighbor storage device with smaller storage size to store neighbor data for context selection and associated method

A video processing system includes a storage device, a receiving circuit, an audio/video demultiplexing circuit, a video decoder, and a display engine. The storage device includes a data buffer, a bitstream buffer, and a display buffer. An output of the receiving circuit is written into the data buffer. An input of the audio/video demultiplexing circuit is read from the data buffer, and an output of the audio/video demultiplexing circuit is written into the bitstream buffer. An input of the video decoder is read from the bitstream buffer, and an output of the video decoder is written into the display buffer. An input of the display engine is read from the display buffer. Each of the data buffer, the bitstream buffer, and the display buffer is a ring buffer.

Video processing system using ring buffer and racing-mode ring buffer access control scheme

An entropy decoding apparatus includes an entropy decoding circuit, a pre-fetch circuit, and a context pre-load buffer. The pre-fetch circuit pre-fetches at least one candidate context for entropy decoding of a part of an encoded bitstream of a frame before the entropy decoding circuit starts entropy decoding of the part of the encoded bitstream of the frame. The context pre-load buffer buffers the at least one candidate context. When a target context actually needed by entropy decoding of the part of the encoded bitstream of the frame is not available in the context pre-load buffer, the context pre-load buffer instructs the pre-fetch circuit to re-fetch the target context, and the entropy decoding circuit stalls entropy decoding of the part of the encoded bitstream of the frame.

Entropy decoding apparatus with context pre-fetch and miss handling and associated entropy decoding method

A video encoder has a processing circuit and a universal binary entropy (UBE) syntax encoder. The processing circuit processes pixel data of a video frame to generate encoding-related data, wherein the encoding-related data comprise at least quantized transform coefficients. The UBE syntax encoder processes a plurality of syntax elements to generate UBE syntax data. The encoding-related data are represented by the syntax elements. The processing circuit operates according to a video coding standard. The video coding standard supports arithmetic encoding. The UBE syntax data contain no arithmetic-encoded syntax data.

Video processing system using low-cost video encoding/decoding architecture

A syntax parsing apparatus includes a plurality of syntax parsing circuits and a dispatcher. Each of the syntax parsing circuits has at least entropy decoding capability. The syntax parsing circuits generate a plurality of entropy decoding results of a plurality of image regions within a same frame, respectively. The dispatcher assigns bitstream start points of the image regions to the syntax parsing circuits, and triggers the syntax parsing circuits to start entropy decoding, respectively.

Syntax parsing apparatus with multiple syntax parsing circuits for processing multiple image regions within same frame or processing multiple frames and related syntax parsing method

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Hsinchu, Taiwan

Ming-Long Wu